arch/.unmaintained/m68k-pp-native/battclock/readbattclock.c

   1 /*
   2     Copyright © 1995-2001, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: ReadBattClock() function.
   6     Lang: english
   7 */
   8 #include "battclock_intern.h"
   9 #include <asm/registers.h>
  10
  11 /*****************************************************************************
  12
  13     NAME */
  14 #include <proto/battclock.h>
  15 #include <proto/utility.h>
  16 #include <utility/date.h>
  17
  18         AROS_LH0(ULONG, ReadBattClock,
  19
  20 /*  SYNOPSIS */
  21         /* void */
  22
  23 /*  LOCATION */
  24         struct BattClockBase *, BattClockBase, 2, Battclock)
  25
  26 /*  FUNCTION
  27         Return the value stored in the battery back up clock. This value
  28         is the number of seconds that have elapsed since midnight on the
  29         1st of January 1978 (00:00:00 1.1.1978).
  30
  31         If the value of the battery clock is invalid, then the clock will
  32         be reset.
  33
  34     INPUTS
  35
  36     RESULT
  37         The number of seconds since 1.1.1978 00:00:00
  38
  39     NOTES
  40
  41     EXAMPLE
  42
  43     BUGS
  44
  45     SEE ALSO
  46         WriteBattClock, ResetBattClock
  47
  48     INTERNALS
  49
  50     HISTORY
  51         27-11-96    digulla automatically created from
  52                             battclock_lib.fd and clib/battclock_protos.h
  53
  54 *****************************************************************************/
  55 {
  56         AROS_LIBFUNC_INIT
  57
  58         struct ClockData date;
  59         ULONG  secs;
  60         ULONG rtctime = RREG_L(RTCTIME);
  61
  62         date.sec  = (rtctime & SECONDS_M);
  63         date.min  = (rtctime & MINUTES_M) >> 16;
  64         date.hour = (rtctime & HOURS_M  ) >> 24;
  65
  66         date.mday  = 0;
  67         date.month = 0;
  68         date.year  = 0;
  69
  70         secs = Date2Amiga(&date);
  71
  72         return secs;
  73
  74         AROS_LIBFUNC_EXIT
  75 } /* ReadBattClock */